Compares throughput, latency, concurrency models, and ideal usage scenarios.

Evaluates throughput, concurrency models, and ideal use cases for Node.js and Python based on recent metrics.

Evaluates Node.js and Python for backend performance, scalability, and ideal use cases.

Explores ideal use cases where Node.js’s event-driven, asynchronous model outperforms traditional frameworks like Django or Rails.

Explores specific application scenarios where Node.js excels due to its architecture, compared to synchronous backends.

Explores Node.js architecture and asks why developers choose it for server-side applications.

My Node.js app launches multiple shell commands via child_process.spawn() in parallel. It's slow, causes spikes in memory and CPU, and sometimes crashes. What alternatives can help avoid these slowdowns?

Some APIs in my Node.js/Express app respond slowly occasionally—responses take several seconds even though CPU & memory usage look normal and DB calls are fast. Distributing load across PM2 cluster doesn't help. What might be causing this slowdown?

When processing a large number of files (e.g. reading or watching directories with thousands of files), Node.js throws: arduino Copy code Error: EMFILE: too many open files Even though .readFile() or .watch() is used, the process crashes. How can...

My Node.js service consumes more memory over time—even without increased load—and eventually crashes with heap out of memory. What's likely causing this leak?

I configured a custom Undici Agent with very large timeouts (e.g. headersTimeout: 3,000,000), but long-running fetch calls still fail after several minutes with TypeError: fetch failed caused by HeadersTimeoutError.

When using built-in fetch() in Node.js (v18+), requests occasionally fail with: php Copy code TypeError: fetch failed cause: ConnectTimeoutError (code: 'UND_ERR_CONNECT_TIMEOUT') Even using AbortSignal.timeout(…) set to a high value (e.g. 20 s)...

When performing an HTTP request in Node.js using the built-in fetch() (Node ≥18), the promise sometimes fails with: javascript Copy code TypeError: fetch failed [cause]: ConnectTimeoutError: Connect Timeout Error code: 'UND_ERR_CONNECT_TIMEO...

My application needs to spawn multiple processes (e.g. shell commands) concurrently, but performance degrades dramatically with many processes. Why is spawn() slow under heavy usage?

Occasionally my Node.js app crashes or behaves unpredictably without clear errors, especially during fs.readFile, Promises, or async calls. How should I handle errors more robustly?

Under load, my Node.js server slows down or becomes unresponsive. CPU usage spikes, and incoming requests lag or queue up. What’s causing this slow-down?

After running for a while, my Node.js process crashes with: pgsql Copy code FATAL ERROR: Reached heap limit Allocation failed – JavaScript heap out of memory What typically causes this, and how can I prevent it?

My Node.js code has multiple layers of nested callbacks, making it hard to read and maintain. Error handling is messy and debugging feels frustrating. How do I fix this?

❓ Problem Statement I enabled CORS using Express’s cors() middleware in my Node.js API, but browser errors still say: “No 'Access-Control-Allow-Origin' header is present…”

My Node.js service’s heap usage climbs steadily over time, CPU becomes unresponsive, and eventually crashes with “JavaScript heap out of memory”. How do I detect, debug, and fix such memory leaks?